Otherwise check if the file type filter box at the bottom right of the Track Icon loading window is set to [All supported images].

Thanks for that, solger.
In the past selecting ' set track icon ' has opened the correct ' track-icon ' folder automatically. Why that should have stopped happening I cannot say.
Anyway- I navigated to the folder, as you suggested, opened the icon I wanted and now the correct track-icon folder appears automatically again. Thanks.

I've got the correct path, set to ' all supported files ', select icon, click ' open'.................no icon appears. It's a minor bug and I can work without them- but they are very useful and I'd like to solve it.